19.1-1. Equimolar Counterdiffusion of a Binary Gas Mixture. Helium and nitrogen gas are contained in a conduit 5 mm in diameter and 0.1 m long at 298 K with a uniform constant pressure of 1.0 atm abs. The partial pressure of He at one end of the tube is 0.060 atm and at the other end it is 0.020 atm. The diffusivity can be obtained from Table 18.2-1. Calculate the following for steady-state equimolar counterdiffusion: (a) Flux of He in kg mol/s m² and g mol/s ⚫ cm² (b) Flux of N2 (c) Partial pressure of He at a point 0.05 m from either end